Olive Oil.--Difficulties encountered in raising an olive
crop.--Process of making Oil. 7064
IV. ELECTRICITY. ETC.--Telephony and Telegraphy on the Same
Wires Simultaneously.--4 figures. 7067
The Electric Marigraph.--An apparatus for measuring the
height of the tide.--With engravings and diagrams showing
the Siemens and Halske marigraph and the operation of the
same. 7068
Delune & Co.'s System of Laying Underground Cables.--2
figures. 7069
Electricity Applied to Horseshoeing.--Quieting an unruly
animal.--3 engravings. 7069